File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

김봉수

Kim, BongSoo
Polymer & Organic Semiconductor Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

High-Crystalline Medium-Band-Gap Polymers Consisting of Benzodithiophene and Benzotriazole Derivatives for Organic Photovoltaic Cells

Author(s)
Kim, Ji-HoonSong, Chang EunShin, NaraKang, HyunbumWood, SebastianKang, In-NamKim, Bumjoon J.Kim, BongSooKim, Ji-SeonShin, Won SukHwang, Do-Hoon
Issued Date
2013-12
DOI
10.1021/am401926h
URI
https://scholarworks.unist.ac.kr/handle/201301/24803
Fulltext
https://pubs.acs.org/doi/10.1021/am401926h
Citation
ACS APPLIED MATERIALS & INTERFACES, v.5, no.24, pp.12820 - 12831
Abstract
Two semiconducting conjugated polymers were synthesized via Stille polymerization. The structures combined unsubstituted or (triisopropylsilyl)ethynyl (TIPS)-substituted 2,6-bis(trimethylstannyl)benzo[1,2-b':4.5-bldithiophene (BDT) as a donor unit and benzotriazole with a symmetrically branched alkyl side chain (DTBTz) as an acceptor unit. We investigated the effects of the different BDT moieties on the optical, electrochemical, and photovoltaic properties of the polymers and the film crystallinities and carrier mobilities. The optical-band-gap energies were measured to be 1.97 and 1.95 eV for PBDT-DTBTz and PTIPSBDT-DTBTz, respectively. Bulk heterojunction photovoltaic devices were fabricated and power conversion efficiencies of 5.5% and 2.9% were found for the PTIPSBDT-DTBTz- and PBDT-DTBTz-based devices, respectively. This difference was explained by the more optimal morphology and higher carrier mobility in the PTIPSBDT-DTBTz-based devices. This work demonstrates that, under the appropriate processing conditions, TIPS groups can change the molecular ordering and lower the highest occupied molecular orbital level, providing the potential for improved solar cell performance.
Publisher
AMER CHEMICAL SOC
ISSN
1944-8244

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.